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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Medina Co/Northwest PWS

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

88

Samples

0

Samples exceeding legal limit (MCL)

27

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.294 ppb168ND - 0.680 ppb
2015ND160ND
20160.142 ppb164ND - 0.660 ppb
20170.484 ppb1611ND - 0.880 ppb
20180.156 ppb164ND - 0.700 ppb
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-06A140029568ND
2014-02-06A140029565ND
2014-02-06A140029566ND
2014-02-06A140029567ND
2014-05-05A140180099ND
2014-05-05A140180098ND
2014-05-05A140180100ND
2014-05-05A140180101ND
2014-08-05A1402140110.580 ppb
2014-08-05A1402140080.610 ppb
2014-08-05A1402140090.540 ppb
2014-08-05A1402140100.680 ppb
2014-11-06A1402140120.580 ppb
2014-11-06A1402140130.540 ppb
2014-11-06A1402140140.580 ppb
2014-11-06A1402140150.590 ppb
2015-02-05A150231768ND
2015-02-05A150231767ND
2015-02-05A150231766ND
2015-02-05A150231765ND
2015-05-07A150232369ND
2015-05-07A150232370ND
2015-05-07A150232371ND
2015-05-07A150232368ND
2015-08-06A150304269ND
2015-08-06A150285799ND
2015-08-06A150285800ND
2015-08-06A150304268ND
2015-11-05A150331557ND
2015-11-05A150331558ND
2015-11-05A150331555ND
2015-11-05A150331556ND
2016-02-04A160338292ND
2016-02-04A160338291ND
2016-02-04A160338290ND
2016-02-04A160338289ND
2016-05-05A160338293ND
2016-05-05A160338294ND
2016-05-05A160338295ND
2016-05-05A160338296ND
2016-08-04A1604273610.540 ppb
2016-08-04A1604273640.560 ppb
2016-08-04A1604273600.660 ppb
2016-08-04A160427365ND
2016-11-03A160435204ND
2016-11-03A1604352070.510 ppb
2016-11-03A160435205ND
2016-11-03A160435206ND
2017-02-02A170476897ND
2017-02-02A170476899ND
2017-02-02A170476898ND
2017-02-02A170476896ND
2017-05-03A1704352100.700 ppb
2017-05-03A1704352110.690 ppb
2017-05-03A1704352120.670 ppb
2017-05-03A1704352130.660 ppb
2017-08-03A1704352150.740 ppb
2017-08-03A1704352140.780 ppb
2017-08-03A1704352170.820 ppb
2017-08-03A1704352160.880 ppb
2017-11-07A1704352220.600 ppb
2017-11-07A170435223ND
2017-11-07A1704352210.600 ppb
2017-11-07A1704352200.600 ppb
2018-02-07A180532743ND
2018-02-07A180532744ND
2018-02-07A180532745ND
2018-02-07A180532746ND
2018-05-03A180532750ND
2018-05-03A180532749ND
2018-05-03A180532748ND
2018-05-03A180532747ND
2018-08-01A180600569ND
2018-08-01A180600570ND
2018-08-01A180600571ND
2018-08-01A180600572ND
2018-11-078K01175-040.700 ppb
2018-11-078K01175-030.600 ppb
2018-11-078K01175-020.600 ppb
2018-11-088K01175-010.600 ppb
2019-05-029E00509-01ND
2019-05-029E00509-02ND
2019-05-029E00509-03ND
2019-05-029E00509-04ND
2019-08-059H01563-01ND
2019-08-059H01563-02ND
2019-08-059H01563-03ND
2019-08-059H01563-04ND